A job fair was advertised on a job posting website. There were five interviewers, the store manager and people from the HR department. It was held in a classroom at a University, and walk-ins were welcome. You waited your turn to speak one-on-one with one of the interviewers, each of which had a desk at the front of the room. You were asked to bring a resume, which they skimmed briefly before asking you questions. If you passed, HR would direct you to the store manager who would speak to you briefly and, if he approved, offered you the job on the spot. Very informal. Dress nice, but not business attire.